Henry c



(No Model.)

H. C. WEEDEN.

TRAP.

No. 360,128.- Patented Mar. 29, 1887.'

iinrrn rares ATENT FFICE@ HENRY C. VEEDEN, OF BOSTON, MASSACHUSETTS.

TRAP.

SPECIFICATION forming part of Letters Patent No. 360,128, dated March 29, 1887.

(No modeLi To @ZZ whom, it may concern:

Be it known that l, HENRY O. VEEDEN, of Boston, in the county of Suffolk and State of Massachusetts, a citizen ot' the United States, have invented certain new and useful Improvements in Traps for-the Discharge-Pipes ot' Basins, Bath/funs, Sinks, and Analogous Structures, of which the following is a specitication.

The object of my present improvement is to provide a water-trap the seal of which shall be proof against being broken either by backpressure orsiphonage,even though no ventilating or airsupply pipe be used in connection with it; and in the accompanying drawings I have represented in vertical section a trap embodying my present improvements, which I will now proceed to point out.

y improved trap contains, as is customary in structures of thisclass, an inlet-pipe, A.,

*connecting with the fixture to be trapped, an

outlet-pipe, B, connecting with the sewer or other receptacle into which the contents of the fixture are to be discharged, and an interposed water-chamber, O, with which both the inlet and outlet pipe communicate, the latter at the higher level, so as to form a water seal in the ordinary manner. My improvement consists in providing the inlet-pipe with a valve arranged to open apassage from the inlet-pipe to the trap, chamber,aud outlet-pipe, but to close the passage in the reverse direction. An ordinary flap-valve on the end ol" the inletpipe will accomplish this purpose, and such a valve is represented at I) in the drawing. I also provide a valve arranged to bear upon 'and close the oriiice ofthe outlet pipe, but to open by flotation when the water in the trap-chamber has risen to a sufficient height. An ordinary iloatvalve-that is to say, a valve provided with a float which norinally rests upon and covers the mouth of the outlet-pipe, but which will float up and open the same when the water rises in the trapehamber-is a convenient form of valve for the purpose described; and I have represented such a valve at E in the drawing. In connection with a valve of this forin,should a central guide be desired, it can be conveniently obtained, as shown in the drawing, by a stem,F,

passing down into a hole in the upper part of an annular float-chaniber,of thin metal-as,for example, copper-made watertight/,the guide E entering the space in the center of the annulus to guide the valve as it rises and falls.

The operation of the trap is as follows: The parts normally stand as represented in the drawing, the outlet-pipe valve bearing upon and closing the mouth of the outlet. In case, now, that water is discharged from the fixture through the trap,the valveD on the inlet-pipe opens and allows the water to pass into the trap, and this water rising causes the valve E to rise and open the orifice of the outlet-pipe, thus allowing the tlow of water through the trap to the drain or soil pipe. As soon as the flow of water ceases, the subsidence of water in the trap-chamber allows the valve E to close the orifice ofthe outlet-pipe. Should a tendency to Isiphonage occur-as, for example, by the sudden passage of a body of water through the drain past the mouth of the outlet-pipe, thereby producing an outward draft in itthe valve E will press even moretightly against the orifice of the outlet-pipe, thereby preventing the siphonage or drawing off of the contents ofthe trap. On the other hand,the valve D on the mouth of the inlet-pipe will, in like manner, prevent the displacement ofthe water in the trap by back-pressure.

I prefer to make the water-chamber cylin` drical and to provide it with a cleanoutcover at the top in the ordinary manner, as shown.

I claim- T'he improved trap herein described,havin`g an inlet-pipe, an outlet-pipe, `and an intermediate water-chamber, the orifice of the inletpipe being provided with a valve opening toward the water-chamber, and the orifice ofthe outletpipe being provided with a oat-valve located within the water-chamber, all substantially as set forth, and for the purposes herein specilied.

In testimony whereof I have hereunto subscribed my name this 23d day of December, A. D. 1886.

HENRY O. VEEDEN.

Vi tnesses J. HENRY TAYLOR, E. B. ToMLINsoN. 

